parlour car vs chair car

parlour car and chair car both are nouns.

Word	Noun	Adjective	Verb	Adverb
parlour car	Yes	No	No	No
chair car	Yes	No	No	No

As nouns, parlour car and chair car are synonyms defined as:

parlour car and chair car: a passenger car for day travel; you pay extra fare for individual chairs

Other synonyms of parlour car include drawing-room car, palace car, parlor car.

parlour car (noun)	chair car (noun)
a passenger car for day travel; you pay extra fare for individual chairs	a passenger car for day travel; you pay extra fare for individual chairs